What is the ruling on working for a website that pays users for watching advertisements and requires them to deposit sums of money to increase their profits, with the deposited amount being reclaimable after two months?

It is permissible to profit from clicking on advertisements under two conditions: that the advertisements are permissible and do not promote anything forbidden, and that the wage is not unknown.

It is not permissible to deposit money into the website, because it is a loan that draws benefit, which is usury (riba), as the Prophet, peace and blessings be upon him, forbade combining a loan with a sale.